Snapping-rolls for corn-harvesters.



J. A. STONE SNAPPING ROLLS POE CORN HARVESTBRS.

APPLIOATION FILED JULY 20, 1910.

Patented May 16, 1911.

in v D N Wesses UNITED %TATE PATENT OFFICE.

JOHN A. STONE, OF CHICAGO, ILLINOIS, ASSIGNOR T0 INTERNATIONALI-IARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

SNAPPINGr-BOLLS FOR CORN-HARVESTERS.

Specification of Letters Patent.

Patented May 16, 1911.

Application filed July 20, 1910. Serial No. 572,825.

To all whom it may concern:

Be it known that I, JOHN A. STONE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Snappingltolls forCorn-Harvesters, of which the following is a specification.

My invention relates to snapping rolls designed to sever the ears ofcorn from the stalk, and consists in a novel construction of the rollsand stalk advancing means whereby a high degree of efficiency isattained in the operation of the mechanism; the object of my inventionbeing to provide a mechanism that will sever the ears from the stalks ina positive manner and with little consumption of power. I attain theseobjects by means of the mechanism illus trated by the accompanyingdrawing, in which Figure 1 is a top plan view of a pair of snappingrolls having my invention forming a part thereof; Fig. 2 represents aportion of the rolls shown in Fig. 1 when given a partial rotation upontheir axes; Fig. 3 is an enlarged cross section of Fig. 2 along line AB;and Fig. 4 is a detached detail illustrating the joint action of therolls in severing an ear from the stalk.

The same reference characters designate like parts through the severalviews.

1 and 2 represent right and left hand rolls secured to shafts 3 and 4,respectively, and having intermeshing gear members 6 adapted to rotatethem in opposite directions, the rolls being tapered at their receivingends for the purpose of facilitating the entrance of stalks betweenthem, the tapered portions of the rolls being provided with oppositelydisposed spirally arranged ribs 7 operative to cause the stalks to moverearward between them.

The body of the roll 1 is in the shape of a right cylinder throughoutits length, and provided with a double series of spirally arrangedgrooves S, having a rearward lead around the periphery of the roll in adirection opposite to that in which it rotates, the grooves of oneseries alternating with those of the other, the separate series beingdisposed upon opposite sides of the roll, each individual groove of bothseries terminating at its rear end in a pocket having side Wallsgradually raised above the periphery of the roll and eccentric to itsaxis, as shown in Fig. 3.

The body portion of roll 2 is not wholly cylindrical, the portions 9 ofthe periphery thereof gradually receding from the axis in a directionopposite to that of the rotation of the roll upon opposite sidesthereof, and terminating in lines substantially parallel with the axis.There is a double series of spirally arranged shallow grooves 10 uponthe opposite halves of its periphery that lead rearward in a directionopposite to that of rotation of the roll and terminate at the parts ofthe periphery thereof most remote from its axis, the grooves of oneseries alternating with those of the other, and each series registeringwith the corresponding series upon the companion roll 1 as the two rollsare rotated in opposite directions.

11 represents ribs raised above the periphery of the roll and arrangedalong the sides of the grooves toward the stalk receiving end of theroll and having their terminals overlapping in a manner forming shortchannels 12 with open ends at the ends of the grooves leading toward theopposite end of the roll, and 13 represents teeth projecting outwardfrom the bottom of the channels intermediate their terminal Walls, theteeth being adapted to enter the pockets at the terminals of the groovesin the com panion roll and the walls of the channels to overlap those ofthe pockets, as shown in Fig. 1.

In the operation of the mechanism the stalks are received between thetapered ends of the rolls and are drawn downward by means of rollsrotating in opposite directions, and rearward by means of the spirallyar ranged ribs and grooves, the bodies of the rolls being spaced apartin a manner producing an aggressive action of the rolls when in contactwith the body of the stalks, resulting in a consequent saving of power,and as the ear stems are engaged by the grooves in the rolls they arecarried downward thereby until the butt of the ear is reached and acomplete severance of the car from its stem is obtained when the butthas traversed the opposing grooves and contacts with the terminal tooththat cooperates with the non-cylindrical part of the roll in anaggressive manner to pinch the stem from the ear.

l/Vhat I claim as my invention, and desire to secure by Letters Patent,is:

1. Snapping rolls for corn harvesters rotatable in opposite directions,each roll having a double series of spirally arranged grooves uponopposite portions of its periphery in alternating relation, each groovehaving a rearward lead in a direction opposite to that in which the rollrotates, the series upon one roll registering with those of the opposingseries on the other roll when the rolls are rotated, the grooves uponone of the rolls terminating in open ended channels and those of theother in pockets formed by flanges that are received by said channels.

2. Snapping rolls for corn harvesters rotatable in opposite directions,each roll having a double series of spirally arranged grooves uponopposite portions of its periphery in alternating relation, the groovesof each series terminating in lines substantially parallel with the axisof the roll, each groove having a rearward lead in a dlrection oppositeto that in which the roll rotates, and the series upon one rollregistering with those of the opposing series on the other roll when therolls are rotated, the grooves upon one of the rolls terminating in openended channels and those upon the other in pockets formed by flangesthat are received by said channels, said channels and pockets being'raised above the periphery of the rolls.

3. Snapping rolls for corn harvesters rotatable in opposite directions,each roll having a double series of spirally arranged grooves uponopposite portions of its periphcry in alternating relation, the groovesof each series terminating in lines substantially parallel with the axisof the roll, each groove having a rearward lead in a direction oppositeto that in which the roll rotates, and the series upon one rollregistering with those of the opposite series upon the other roll whenthe rolls are rotated, the grooves upon one of the rolls terminating inopen ended channels, and those upon the other in pockets formed byflanges, said channels having stem pinching teeth intermediate theirwalls that are received by said pockets when the rolls are rotated.

4:. Snapping rolls for corn harvesters r otatable in oppositedirections, one of said rolls having its body cylindrical with parallelsides, the companion roll having portions of its periphery graduallyreceding from its axis in a direction opposite to that of the rotationof said roll upon the opposite side thereof, the cylindrical roll havinga double series of spirally arranged grooves upon opposite portions ofits periphery in alternating relation, said grooves having a rearwardlead in a direction opposite to that of the rotation of the rolls, eachof said grooves terminating in a pocket formed by flanges that areraised above the periphery of the roll, the companion roll having acorresponding double series of spirally arranged grooves upon oppositesides thereof in alternating relation and having a rearward lead in anopposite direction to that of the rotation of the roll and terminatingin open end-ed channels formed by flanges raised above the periphery ofthe roll, the series of grooves upon one roll registering with those ofthe other when the rolls are rotated, the pockets of one series beingreceived by the channels forming part of the opposing series.

5. Snapping rolls for corn harvesters rotatable in opposite directions,one of said rolls having its body cylindrical with parallel sides, thecompanion roll having portions of its periphery gradually receding fromits axis upon opposite sides thereof in a direction opposite to that ofthe rotation of the roll, said enlarged portions terminating in linessubstantially parallel with the axis of the rolls, the cylindrical rollhaving a double series of spirally arranged grooves upon oppositeportions of its periphery in alternating relation, said grooves having arearward lead in a direction opposite to that of the rotation of theroll, each of said grooves terminating in a pocket formed by flangesthat are raised above the periphery of the roll, the companion rollhaving a corresponding double series of spirally arranged grooves uponopposite sides thereof in alternating relation, said grooves having arearward lead in a direction opposite to that of the rotation of theroll and terminating in open ended channels formed by flanges that areraised above the periphery of the roll, the channel terminals beingsubstantially coincident with the terminal line of the enlarged portionsof the roll, the series of grooves upon one roll registering with thoseof the other when the rolls are rotated, and the pockets of one seriesbeing received by the channels forming part of the opposing series. 6.Snapping rolls for corn harvesters rotatable in opposite directions,each roll having a double series of spirally arranged grooves uponopposite portions of its periphery in alternating relation, each groovehaving a rearward lead in a direction opposite to that in which the rollrotates, the grooves upon one roll registering with those of theopposing series upon the other roll when the rolls are rotated, thegrooves upon one of the rolls terminating in pockets form-ed by flangesraised above the periphery of the roll, and those upon the companionroll having ribs raised" above the periphery thereof and arranged alongthe sides of the grooves toward the stalk receiving end thereof.

7. Snapping rolls for corn harvesters rotatable in opposite directions,each roll having a double series of spirally arranged grooves uponopposite portions of its periphery in alternating relation, each groovehaving a rearward lead in a direction opposite to that in which the rollrotates, the grooves upon one roll registering with those of theopposing series when the rolls are rotated, the grooves upon one of therolls terminating in pockets raised above the periphery of the roll andthose upon the companion roll having ribs raised above the peripherythereof and arranged along the sides of the grooves toward the stalkreceiving end there of and having their terminals overlapping ina-manner forming short open ended channels at the ends of the groovesleading toward the opposite ends of the roll, and stem pinching teethprojecting outward from the bottom of the channel intermediate theirterminal walls.

JOHN A. STONE.

Witnesses:

EDw. J. TEUFEL, ROLAND HILL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

